a voluntary tax on vintners covers the rest. angel calderon runs the centers. he says the 81-year-old priest created a model for farm worker housing. >> he was a saint because i don't know everybody else in this valley doing that much for the farm workers. >> reporter: father brenkle also cofounded a nonprofit that helped develop more than 900 affordable housing units. >> as i look back, i have a sense of peace and satisfaction. >> reporter: so for his tireless fight for farm worker housing this week's jefferson award in the bay area goes to father john brenkle. sharon chin, cbs 5. >> much deserved. you can nominate your local heroes for a jefferson award online at our website, cbssf.com. >>> with the prince by her side, the duchess of cambridge left a london hospital today after an eventful few days of medical tests, media coverage and one infamous prank call. monica villamizar has the latest. >> reporter: the duchess of cambridge smiled as she made her first public appearance since the royal family announced she is pregnant. she and her husband, prince willia